package com.java2207.group1.controller;

import com.alibaba.excel.EasyExcel;
import com.alibaba.excel.read.builder.ExcelReaderBuilder;
import com.alibaba.excel.read.builder.ExcelReaderSheetBuilder;
import com.alibaba.excel.util.FileUtils;
import com.alibaba.excel.write.builder.ExcelWriterBuilder;
import com.alibaba.excel.write.builder.ExcelWriterSheetBuilder;
import com.java2207.group1.bo.BreakfastBo;
import com.java2207.group1.bo.PurchaseBo;
import com.java2207.group1.common.LayuiPageVo;
import com.java2207.group1.common.R;
import com.java2207.group1.listener.WebPurchaseListener;
import com.java2207.group1.pojo.Purchase;
import com.java2207.group1.service.PurchaseService;
import com.java2207.group1.util.OssUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import java.util.List;
import java.util.Map;

/**
 * @author AL 2022/7/27  8:54
 */
@RestController
@RequestMapping("/purchase")
public class PurchaseController {

    @Autowired
    private PurchaseService purchaseService;

    @Autowired
    private WebPurchaseListener webPurchaseListener;

    @RequestMapping("/addPurchase")
    public R addPurchase(Purchase purchase) {

        int result = purchaseService.addPurchase(purchase);
        if (result == 1) {
            return R.ok();
        } else {
            return R.error();
        }
    }

    @RequestMapping("/deletePurchase")
    public R deletePurchase(Integer id){

        int result = purchaseService.deletePurchase(id);
        if (result == 1){
            return R.ok();
        }else{
            return  R.error();
        }
    }

    @RequestMapping("/updatePurchase")
    public R updatePurchase(Purchase purchase){
        System.out.println(purchase);
        int result = purchaseService.updatePurchase(purchase);
        if (result == 1){
            return R.ok();
        }else{
            return  R.error();
        }
    }

    @RequestMapping("/purchaseList")
    public LayuiPageVo<Purchase> PurchasepageDate(@RequestParam Map<String,Object> params){
        return purchaseService.purchasePageDate(params);
    }

    @RequestMapping("/upload")
    public R uploadPic(MultipartFile file) throws IOException {

        if (file != null) {
            String originalFilename = file.getOriginalFilename();
            InputStream inputStream = file.getInputStream();
            String url = OssUtil.uploadFile(inputStream, originalFilename);
            return R.ok().data("url", url);
        }
        return R.error();
    }

//    @RequestMapping("/echartsBar")
//    public R echartsBar() {
//        List<BarVo> list = purchaseService.meatBarData();
//        return R.ok().data("meatBar", list);
//    }
//
//    @RequestMapping("/echartsPie")
//    public R echartsPie() {
//        List<PieVo> list = purchaseService.meatPieData();
//        return R.ok().data("meatPie", list);
//    }

    @RequestMapping("/export")
    public void export(Map<String,Object> params, HttpServletResponse response) throws IOException {
        // 设置表格的响应头
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");

        // 下载的文件名 是中文 要进行转码 不然会乱码
        String filename = URLEncoder.encode("采购信息导出", "utf-8");

        // 告诉浏览器 下载文件
        response.setHeader("Content-Disposition","attachment;filename="+filename+".xlsx");

        // 得到浏览器的输出流 像浏览器写输出
        ServletOutputStream outputStream = response.getOutputStream();

        ExcelWriterBuilder write = EasyExcel.write(outputStream, BreakfastBo.class);

        ExcelWriterSheetBuilder sheet = write.sheet();

        // 准备满足条件的集合数据
        List<PurchaseBo> purchases =  purchaseService.purchaseExcelData(params);
        //  把集合数据写到输出流
        sheet.doWrite(purchases);
    }

    @RequestMapping("/templateDownload")
    public void templateDownload(HttpServletRequest request, HttpServletResponse response) throws IOException {
        //下载excel 的 响应头
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("utf-8");
        //读取服务器上的模板文件 写到浏览器
        //得到模板文件的路径
        String realPath = request.getServletContext().getRealPath("/template/早餐信息模板.xlsx");

        //根据文件路径 创建File 对象
        File file = new File(realPath);

        // 把File  对象转为 字节数组
        byte[] bytes = FileUtils.readFileToByteArray(file);
        // 下载的文件名 是中文  要进行转码  要不然会出现乱码
        String filename = URLEncoder.encode("早餐信息模板", "utf-8");

        // 告诉浏览器  下载文件
        response.setHeader("Content-Disposition","attachment;filename="+filename+".xlsx");

        //得到指向浏览器的输出流  向浏览器写输出
        ServletOutputStream outputStream = response.getOutputStream();
        // 把字节数组 输出到浏览器
        outputStream.write(bytes);

        outputStream.close();
    }

    // 读取excel 文件数据 存到数据库中
    @RequestMapping("/import")
    public R importExcel(MultipartFile file) throws IOException {
        // 避免遇见请求报错
        if(file!=null){
            /**
             * 参数1  文件流
             * 参数2  读取到的数据封装到哪个数据类型中
             * 参数3  监听器  每读取一行数据 就会调用监听器中的 invoke  方法
             * */
            ExcelReaderBuilder read = EasyExcel.read(file.getInputStream(), PurchaseBo.class, webPurchaseListener);
            // 得到 sheet 对象
            ExcelReaderSheetBuilder sheet = read.sheet();
            // 读取sheet
            sheet.doRead();

        }
        return R.ok();
    }
}
